Search found 404 matches

by Dui, ni shuo de dui
May 21 2020 4:54am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1061
Views: 96223

Re: APL's DIY axial-flux motor

I can print up some plastic cores to wind the wire on, but then I need to get it back off, You can design a small taper angle on the plastic core to ease the removal and on to the steel cores without distorting, which would require some kind of glue. Given how thick the wire is I think it should no...
by Dui, ni shuo de dui
May 15 2020 3:03am
Forum: Motor Technology
Topic: Sabvoton designs, features, comparisons, etc
Replies: 17
Views: 393

Re: Help with Sabvoton slide regen? 20$ for fix

So are you guys saying "Sabvoton" is not the brand name of a particular manufacturer, but just a "style" of controller, and the relationship between the actual manufacturers and selling vendors also not clear cut? Well I don't know if it still exists now, but it used to be a brand. I've got two of ...
by Dui, ni shuo de dui
May 15 2020 2:33am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Ninja 250 "Clone" Made in China
Replies: 60
Views: 14333

Re: Ninja 250 "Clone" Made in China

How is the progress, it has been a long time since the last update :wink: Interesting build to follow :thumb: Thanks :) Been a bit busy with other stuff and projects lately, so I haven' done much on the bike. It runs perfectly fine and carries me to work everyday. Still need to make a lid to close ...
by Dui, ni shuo de dui
May 11 2020 11:00pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1061
Views: 96223

Re: APL's DIY axial-flux motor

Looks amazing, again wonderful work!
Can't wait to see it finished and running!!!
by Dui, ni shuo de dui
May 11 2020 9:15pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Chinese eMoto Upgrade feasible?
Replies: 2
Views: 209

Re: Chinese eMoto Upgrade feasible?

Well yeah it's totally feasible... just look at my build in my signature :wink: Your motor choice is good, nothing wrong with it. A friend of mine installed one on his motorcycle and it's real impressive wih a good controller (which as it turns out is the most difficult thing to find, power output a...
by Dui, ni shuo de dui
May 06 2020 2:14am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Need help identifying custom color wires on the controller
Replies: 4
Views: 1363

Re: Need help identifying custom color wires on the controller

Hello, I'll reply here instead of replying in the private messages :) I don't know this brand of controller, it seems like it is decent but you can't expect much power from it. I don't see any kind of wiring or plug suitable for programming, it is possible that there is some kind of plug inside the ...
by Dui, ni shuo de dui
Apr 26 2020 8:56pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1061
Views: 96223

Re: APL's DIY axial-flux motor

Meanwhile, I started designing the fan segments for this motor. I'll have to sneak up on it by printing singles, until I get it to fit just right, and even then I have to wait until the spacers are finish-milled for the air gaps before I can do the final prints. That's so great to finally see your ...
by Dui, ni shuo de dui
Apr 23 2020 8:34pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Yamaha tw200
Replies: 11
Views: 495

Re: Yamaha tw200

Robinev wrote:
Apr 22 2020 11:32pm
This is better

Sent from my iPhone using Tapatalk
Except you can't actually install it.
The swingarm won't fit the chassis without very extensive modifications.
by Dui, ni shuo de dui
Apr 22 2020 11:17pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Yamaha tw200
Replies: 11
Views: 495

Re: Yamaha tw200

It looks like a decent basis. Could you put some pictures of your actual bike so I can see how hard it would be to fit a hub motor, especialy the swing arm? Nothing wrong in using hub motor on a motorbike, it has been done a lot of times and it works very well. It can easily outperform the original ...
by Dui, ni shuo de dui
Apr 22 2020 3:12am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: 2̶5̶k̶W̶ 5kW Electric Pitbike / Small Motorcycle
Replies: 19
Views: 1050

Re: 25kW Electric Pitbike / Small Motorcycle

Hey Dui, turns out you were completely right. Clamp meter only shows 90A maximum draw on the battery cables, so after accounting for some losses, the real power of my bike is actually around 5kW, so five times less than I thought. That's pretty humbling, and gave me a new perspective and respect fo...
by Dui, ni shuo de dui
Apr 09 2020 9:49pm
Forum: Motor Technology
Topic: E-rickshaw / utility cart axles from China
Replies: 4
Views: 204

Re: E-rickshaw / utility cart axles from China

Does anyone have any experience with the e-rickshaw axles that come from Aliexpress? I have a small petrol powered utility cart that has a very unreliable briggs & Stratton petrol on it, 5hp (which is overkill really) that would be much safer and easier to use if it was electric. I don't have exper...
by Dui, ni shuo de dui
Apr 06 2020 9:05pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Kawasaki Z125 build
Replies: 25
Views: 4762

Re: Kawasaki Z125 build

You're also right about the motor power, but my battery is the limiting factor for current draw. Maybe in a few years as batteries get better and cheaper I can upgrade and keep all the same motor and controller. The cost difference between 5kw and 8kw hub motor was pretty small so I just went with ...
by Dui, ni shuo de dui
Apr 02 2020 4:12am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: 2̶5̶k̶W̶ 5kW Electric Pitbike / Small Motorcycle
Replies: 19
Views: 1050

Re: 25kW Electric Pitbike / Small Motorcycle

I guess it's said not water. Yeah, you said yeah. Water is a similar word. Haha, ok got it :lol: Shit on Kelly for being so crazy retarded about clearly stating their specs. I hear the throttles have lag too. Does the throttle have any degree of lag? Yeah Kelly is extremely annoying with its retard...
by Dui, ni shuo de dui
Apr 01 2020 10:40pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: QSMotor 4000W V3 17” Hub Motor Aprilia RS50 Conversion
Replies: 45
Views: 3856

Re: QSMotor 4000W V3 17” Hub Motor Aprilia RS50 Conversion

Oh that's really bad news, the Aprilia looked awesome.... Looks like the swing arm was made of steel, so it should be easy to modify. Maybe if you descibe the issue you have with your brake caliper we can help you figure out a solution. I'm sure we can find some way! Also, did you consider the fact ...
by Dui, ni shuo de dui
Apr 01 2020 10:12pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: 2̶5̶k̶W̶ 5kW Electric Pitbike / Small Motorcycle
Replies: 19
Views: 1050

Re: 25kW Electric Pitbike / Small Motorcycle

Where is the water dude getting 140 amps? The specs for his controller don't have that number anywhere. Not sure if I'm "the water dude", whatever that means, but the 140 Amps specs come from googling "KLS-N 350A" and litterally looking at the first image that pops up. The spec also matches most co...
by Dui, ni shuo de dui
Mar 31 2020 10:57pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: 2̶5̶k̶W̶ 5kW Electric Pitbike / Small Motorcycle
Replies: 19
Views: 1050

Re: 25kW Electric Pitbike / Small Motorcycle

Awesome build, kudos! Just be aware that your actual power is more around 10-11 KW than 25KW. Reason being that your Kelly controller is rated at 140A. I know it is very tempting, but you can't just take the phase current value and multiply it by the battery voltage, because max phase current will a...
by Dui, ni shuo de dui
Mar 30 2020 2:34am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Kawasaki Z125 build
Replies: 25
Views: 4762

Re: Kawasaki Z125 build

Awesome build, very clean. Just a few remarks and suggestions, if I may: -You should put a second nut on your motor axis, to secure the first one. If it gets loose because of vibrations then you'll ruin your motor. -150A seems quite weak since you're using a 8KW motor. I dont know if your battery an...
by Dui, ni shuo de dui
Mar 30 2020 2:16am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Yamaha FZR-8000 Genesis
Replies: 49
Views: 8561

Re: Yamaha FZR-8000 Genesis

I’m sure my swing arm is different to yours but as mine was box section steel I was able to design a pair of adapter plates that slotted into the box section and had the axle cut out for the QS Motor machined into them. I designed them in CAD and then had them made up by a machine shop in 6061 Alum...
by Dui, ni shuo de dui
Mar 30 2020 1:34am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Freewheel on motor vs freewheel on wheel.
Replies: 2
Views: 234

Re: Freewheel on motor vs freewheel on wheel.

Aside from the difference in noise (the motor freewheel is fairly silent), is there any difference between having the freewheel on the motor vs on the wheel? Any considerations as far as torque, speed, known issues...? Nope, that should be exactly the same. As to why exactly this thing would need a...
by Dui, ni shuo de dui
Mar 20 2020 12:47am
Forum: Motor Technology
Topic: Resources for building the Lebowski open-source motor controller in 2020?
Replies: 12
Views: 866

Re: Resources for building the Lebowski open-source motor controller in 2020?

Really want to give this DIY controller a try, but I'm not sure I have the skills and knowledge to do so. I think it really misses some kind of easy to follow tutorial to at least really understand how to build the thing. I do understand the general principle of how all the parts should work, but th...
by Dui, ni shuo de dui
Mar 19 2020 9:43pm
Forum: Battery Technology
Topic: BMS's in parallel
Replies: 4
Views: 453

Re: BMS's in parallel

1. If I have three 5S BMS in parallel will they conflict with each other? My understanding is parallel cells balance themselves out and the BMS is there to support the series cells, so my inclination is to think that the three in parallel will work?? Yes, it will work. As amberwolf explained, just ...
by Dui, ni shuo de dui
Mar 18 2020 10:53pm
Forum: Battery Technology
Topic: BMS chip getting very hot
Replies: 16
Views: 766

Re: BMS chip getting very hot

Can't really help you on the root cause of your issue, if these two chips get hot there is probably a good reason for that but it's hard to guess since there is no visual damage on your picture. In any case, I'm not sure it is wise to try and fix it, if it got hot due to some defective component or ...
by Dui, ni shuo de dui
Mar 16 2020 9:27pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electric Race Motorbike for NZ Bucket Class
Replies: 13
Views: 1365

Re: Electric Race Motorbike for NZ Bucket Class

Yeah, Id love to consider these, have you got a spec sheet for the ones you've chosen? Weirdly enough I might actually know a supply of these here in NZ. Here you go: https://formula-hybrid.org/wp-content/uploads/A123_AMP20_battery_Design_guide.pdf Also some interesting threads on the forum: https:...
by Dui, ni shuo de dui
Mar 08 2020 10:24pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electric Race Motorbike for NZ Bucket Class
Replies: 13
Views: 1365

Re: Electric Race Motorbike for NZ Bucket Class

Motor I've looked at a few motors and the QS273 V3 70H looks like it would definitely be up to the task. I wanted to gauge ES for some help here though, there are a few people saying they are using motors rated for less power to get 15+kW, which if it works is fantastic. Are there other motors that...
by Dui, ni shuo de dui
Mar 08 2020 9:38pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electric Race Motorbike for NZ Bucket Class
Replies: 13
Views: 1365

Re: Electric Race Motorbike for NZ Bucket Class

LiPo would get the most performance, that's for sure. But they are a bit difficult to maintain and they also are a bit expensive. What you need here is some cells capable of a high discharge rate without too much sagging. I know what I'm going to say might be a bit controversial but I'd recommend yo...